A series of polymeric materials has been prepared by treating poly-N-vinylimidazole (pnvi) with hydrated bis(2,2'-bipyridyl)ruthenium dichloride. The mole ratio of poly-N-vinylimidazole to [Ru(bipy),CI2]*2H,O (pnvi: Ru ratio) was varied from 5: 1 to 50: 1. From spectroscopic and electrochemical studies, both in solution and as thin films, it is shown that depending on the reaction conditions, different types of ruthenium-pnvi complexes are formed. The spectroscopic and electrochemical properties of the metallopolymers obtained are compared to those of mononuclear N-methylimidazole compounds of bis( 2,2'-bipyridyl)ruthenium( 11). An unusual, photochemically induced, reversible ligand-&change process is observed for thin polymer layers in sulphuric acid.
In a series of experiments hydrated bis(2,2'‐bipyridyl)ruthenium(II) dichloride is treated with poly‐N‐vinylimidazole (obtained by polymerization of N‐vinylimidazole with 2,2'‐azoisobutyronitrile as the initiator in a 20:1 ratio) using different solvents and reaction times.
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